Differential effects of pre-tension on shear wave propagation in elastic media with different boundary conditions as measured by magnetic resonance elastography and finite element modeling

Qingshan Chen, Stacie I. Ringleb, Armando Manduca, Richard L. Ehman, Kai Nan An

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Magnetic resonance elastography (MRE) can non-invasively determine material stiffness based on the propagating shear wavelength. Shear wave propagation in a finite homogenous isotropic material can be affected by multiple factors. In this study we examined the effects of pre-tension and frequency on MRE shear measurements of gel phantoms with different boundary conditions, frequencies, and geometries. Results from MRE measurements were compared to wave motion theory in elastic solids and qualitatively to a finite element (FE) model. Results indicated that boundary conditions, geometry and pre-tension are important factors to be considered when performing MRE tests on a finite material, and that FE modeling can help explore how the shear wave propagation is affected under various boundary conditions and axial stresses, among other potential factors.

Original languageEnglish (US)
Pages (from-to)1428-1434
Number of pages7
JournalJournal of Biomechanics
Volume39
Issue number8
DOIs
StatePublished - May 15 2006

    Fingerprint

Keywords

  • Boundary conditions
  • Finite element modeling
  • Flexural wave
  • Magnetic resonance elastography
  • Shear stiffness

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Biomedical Engineering
  • Rehabilitation

Cite this